Equalizer mounting for car trucks



A ril 15 15724.

. p c. s. KNAPP EQUALIZER MOUNTING'FOR CAR TRUCKS Filed April 2, 1920 FIG-2- wnwass: 'mvamow CHARLES s. KNAPF Patented Apr. 15, 1924. L UNITED STATES PATENT OFFICE.

CHARLES S. KNAPP, OF CHICAGO, ILLINOIS, ASSIG-NOR TO THE PULLMAN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

EQUALIZER MOUNTING FOR CAR TRUCKS. I

Application-filed April 2, 1920. Serial No. 370,876.

To all whom it may concern: Later, minor inherent disadvantages of Be it known that I, CHARLES S. KNAPP, a the Berg construction were remedied in the citizen of the United States, residing at Chimanner disclosed in the Parke and Knapp cago, in the county of Cook and State of Patent No. 1,247 ,87 2 granted November 27.

Illinois, have invented certain new and use- 1917, where n eater stability was'attaiiied 0o ful Improvements in Equalizer Mountings by the partlcu ar application of the equalfor Car Trucks, of which the following is a 1 spring to the bar and wheel piece of the specification.

The present invention relates to car Although, y the uc io f the trucks and particularly to the mounting of above D II d patents, the brake shoes 05 the equalizer bar with reference to the frame were rendered readllr 30063811116; h brake and journal-boxes whereby to secure, in a ger and nneetloiis lay behind the high degree, an advantageous distribution eq l h e the elevetloll f he la ter beof the weight to the several wheels whileat g hmlted y he requirement of space beth b k shoes tween the bar and wheel piece for the 70 1 the same time maintaining and their hanger connections readily accesmeuntmg f e qua-hzersprings.

t invention, provision 1S sible for inspection, adjustment and replacey the Q h ment. made for disposing the equalizer-bar at a P i t th B t f t k as higher elevation, in substantially the horirepresented in Patent 1,220,170, granted ZOIIte-I P 0f the Wheel P n ing 75 March 27, 1917, it was customary in f the bar directlyon the frame and removing wheel and six-wheel car truck construction the P g gfr m ween the bar and t k th equalizer-bars e ti on th wheel piece to positions between the ends of journal-boxes of a, form having a, depressed the bill and the ]Oll1Il2ll-l)OX8S WhBIG tllB or bellied central portion, which style of bar springs are guided above the boxes in opso has been necessary to provide sufficient space p yd p d t expanded portions for the accommodation and reception of the 0f the S1618 Walls of the Wheel piece. equalizer-bar springs interposed between the In Order hat the invention in its applitruck frame wheel pieces and the equalizer- Cation and operation may be readily under- :0 b stood, a preferred embodiment of the same is 85 I I i -wh l tru k f th Pull t set forth in the accompanying drawings and it had theretofore been inconvenient to use 111 the fOllOwing d tailed description preditwo brake shoes for each wheel, particularly eeted hereon. The invention being suscepfor the inside of the uter heels, because tlble Of embodiment without restriction $0 an the various parts of such structure and more he specific details shown and described, 00 especially the equalizer-bars and springs however, the drawing and description are prevented a, ready replacement of worn to be taken In an illustrative and not in an shoes. To provide a truck arrangement in unnecessarily limiting sense. which the brake shoes on both sides of the In the drawingsp wheels can readily be inspected has there- Fig. 1 is a fragmentary side elevation of M fore been the aim and object of truck dea car truck; signers for some considerable time. Many of Fig. 2 is a vertical section on the line 2-2 the forms of construction proposed have of Fig. 1; contemplated the entire elimination of the Fig. 3 is a vertical section on the line 3-3 type of equalizer extending in one piece f Flg- 1- V 100 from journal-box to journal-box. Having reference to the drawings in de- The Berg type of truck practically solved tail. the truck is shown as equipped with the the problem by making the equalizer bar truck bolster 10 supported at its opposite straight and forminga recess or pocket on ends on leaf bolster springs 11 interposed beso the under side of the wheel i c f th tween the truck bolster and the spring planks ion truck frame for the accommodation of the 12 and carried in hangers 13 supported by springs, whereby the equalizer-bars and acand pivotally hung-on the truck frame 14. cessory parts were so placed as to permit The wheel piece of the truck frame is shown access to the brake. shoes for inspection, adas supplied with integral pedestals 15 oojustment and replacement. operating with the journal-boxes 16 provid- 11h ed for the axles equipped with the car wheels 17.

At each side of the truck are arranged rigid equalizer-bars 18 bearing at their ends upon the journal-boxes through the mediation of coiled ualizer springs 19, and cap members 20 having longitudinally-extending upstanding flanges 21 and cross ribs 22 seated within under-recesses 23 of the equalizerbar ends.

Each of the equalizer-bars is advantageously made of greater depth intermediate itsends at the point of connection between the bar and thetruck frame to insure the properv distribution of strength and free dom of operation.

The wheel piece of the frame is hollow, aifording a longitudinal cavity Within which 7 the equalizer-bar is housed, the opposed side walls of the wheel piece being of an arcuate expanded shape above each of the journalboxes' to provide a vertical guiding bore 24 for the spring 19 and cap member 20.

In order to insure the maintenance of a proper longitudinal and vertical relation between the bar and frame, and a free pivotal movement for the distribution of the weight from the frame to the journal-boxes, the

equalizer-bar is pivotally mounted within the wheel piece by means of the pivot pin or bolt 25 extending through the bar and the side walls of the wheel piece.

It will be observed that by this construction an eflicient equalization of the load distribution to the several wheels is attained in association with a disposition of the equalizer-bar above the space between adjacent wheels whereby access to the brake shoes, hangers and appurtenant connections is unobstructed.

I claim:

1. In a truck for railway vehicles, the combination with the journal-boxes, of a truck frame having a hollow wheel piece, an

ualizer bar pivoted intermediate its ends wlthin said hollow wheel piece, mounted on said boxes for su porting thereabove the ends of the bar,

sai hollow and springs wheel piece having its side walls arcuately expanded adjacent said springs whereby to provide vertical guides for the same.

2. In a truck for railway vehicles, the combination with I the journal-boxes, of an equalizer bar spanning two of the boxes and pivoted intermediate its ends on the truck frame, springs mounted on said boxes for coaction with the ends of the bar, and spring-guiding means for positioning engagement with the springs throughout their len ths.

3 Ina truck for railway vehicles, the combination with the journal-boxes, of an equalizer bar pivoted intermediate its ends on the truck frame, springs mountedon said boxes for coaction with the bar, and springguiding means for circumferential positioning engagement with the springs throughout their lengths.

' 4. In a truck for railway vehicles, the combination with the journal-boxes of an equalizer bar pivoted intermediate its ends to the truck frame, springs mounted on said boxes for coaction with the bar, and springguiding means rigid with the truck frame and independent of said bar and boxes for circumferential positioning engagement with the springs throughout their lengths.

5. In a truck for railway vehicles, the combination with the journal-boxes, of an equalizer bar pivoted intermediate its ends to the truck frame, s rings mounted on said boxes, cap members disposed on said springs for sup orting thereabove the ends of the bar, and means inde circumferential ositioning engagement with the ca s and t 1e springs throughout the axial engths of the same for vertically guiding the caps and the springs.

In testimony whereof I have hereunto sub-.

scribed my name in the presence of two subscrlblng witnesses.

CHAS. s. KNAPP.

lVitnesses:

G. R. DIXEY, H. F. Snmnnn.

ndent of said bar in" 

